65278656 has 112 divisors (see below), whose sum is σ = 197286880. Its totient is φ = 21150720.

The previous prime is 65278637. The next prime is 65278747. The reversal of 65278656 is 65687256.

It is a super-2 number, since 2×65278656² = 8522605858332672, which contains 22 as substring.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63426 + ... + 64446.

It is an arithmetic number, because the mean of its divisors is an integer number (1761490).

Almost surely, 2^65278656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65278656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98643440).

65278656 is an abundant number, since it is smaller than the sum of its proper divisors (132008224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65278656 is a wasteful number, since it uses less digits than its factorization.

65278656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079 (or 1063 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 65278656 is about 8079.5207778680. The cubic root of 65278656 is about 402.6463205271.

The spelling of 65278656 in words is "sixty-five million, two hundred seventy-eight thousand, six hundred fifty-six".